Hair coloring brush



FIG. 1 is a front elevational view of a hair coloring brush;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a side elevational view thereof, the opposite side being a mirror image;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof.

The portion of the handle shown in broken lines in FIG. 1 forms no part of the claimed design. 

The ornamental design for a hair coloring brush, as shown and described. 